Megastar (メガスター, Megasutā) is a series of planetarium projectors which was recorded in Guinness World Records[1] in 2004 as the planetarium projector that can project the most number of stars in the world. Megastar was developed by Takayuki Ohira in Kawasaki, Japan in 1998.[2] Since 2005, Sega has been selling the HomeStars, which is a home edition of Megastar.